Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a542298a6f557a1…

MALICIOUS

PDF

46.1 KB Created: 2020-10-03 03:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5d78989e72a86d64791f61f794546df SHA-1: d2655300b018cd16f473f0eaeaedd7fea883ac59 SHA-256: 9a542298a6f557a12b5862fe64c93fa00caf6526d3384d61560fec54ff35b10d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/pify?keyword=wii+u+pro+controller+pc'. The document body, though heavily obfuscated, contains this same URL, indicating its likely purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=wii+u+pro+controller+pc In PDF document text
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdfIn PDF document text
    • http://files.akcentkafe.com/uploads/1/3/1/6/131636632/fanebagekolan.pdfIn PDF document text
    • http://jisovi.elizabethchenier.com/uploads/1/3/1/6/131606279/sanejaveduk_kemifigogoduj_tedewi_zogakired.pdfIn PDF document text
    • http://files.lnjspiritwear.com/uploads/1/3/2/6/132681322/xokevuja-nuwudazujokor-muzufipekapujux.pdfIn PDF document text
    • http://files.haeppi-ranch.com/uploads/1/3/0/8/130813514/zijev.pdfIn PDF document text
    • http://jaxavurix.photosbyannalee.com/uploads/1/3/1/6/131637459/vipov.pdfIn PDF document text
    • http://borififo.pollyauctions.com/uploads/1/3/1/3/131381166/dijisowe-ninokuduvewewep-mojamogesoropo.pdfIn PDF document text
    • http://zomivol.dianefelicejewelry.com/uploads/1/3/1/3/131380868/3337fb56dda.pdfIn PDF document text
    • http://ranebax.ickfordpreschool.com/uploads/1/3/0/7/130775447/dowugozoru.pdfIn PDF document text
    • http://sigokoles.westkellowyurts.com/uploads/1/3/0/8/130874523/tiposevukisazodesu.pdfIn PDF document text
    • http://nezid.keithcossey.com/uploads/1/3/1/4/131453915/febota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/35062301729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3273/5655/files/colerain_middle_school_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0933/8275/files/the_last_samurai_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0733/4810/files/61248664880.pdfIn PDF document text
    • http://popotox.parisicoffee.square.site/uploads/1/3/0/7/130739678/9737465.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 4552 bytes
SHA-256: cf1c7f0588d76d03d433da8b03a0afa99101d455c1b872f91d5cea632c4bf8c3
font_01_sfnt_off000087aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AA 10376 bytes
SHA-256: 1615f78437bf999b31321d31007ca03184fe86d09115e9527bbdbe4ceb98d80a

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